I don't know, I've worked so long in various markets, dealing with imported chinese goods, and I can tell you, universally, their products suck.
A big problem is a lack of fine measurement instruments in china. When they duplicate master molds for mass production, they're not really able to ensure that the copies are as good as the originals, reulting in mold drift. Then there's the problem of them going behind your back and using cheaper materials while charging you for the higher end materials. There's just no real system of ethics in china, to borrow a phrase, they practice a brutal form of capitalism.